Classic Thermal Merino Base Layer Crew – Men's

When cold-weather miles demand a reliable next-to-skin layer, this midweight merino crew is our first call for trail runners and backcountry athletes. 100% responsibly sourced merino wool in an interlock knit regulates temperature across changing effort levels and kills odor naturally — no synthetics required. Offset flatlock seams and seam-free shoulder panels sit clean under a pack all day.

• 100% responsibly sourced merino wool regulates body temperature across shifting exertion levels and resists odor without chemical treatments
• Midweight interlock knit construction delivers cold-weather insulation without the bulk that fights against a shell or mid-layer
• Offset flatlock seams with repositioned shoulder and side seam placement eliminate friction and chafe during high-output movement
• Seam-free shoulder panels sit cleanly under pack straps — no pressure points or hotspots on long carry days
• Slim, body-skimming fit layers efficiently under a shell without bunching — available in a wide range of colors from classic Black and Charcoal Heather to Burnt Sienna, Nival Blue, and Mink Color Shift